Apparatus for annealing.



P. H. DANIELS.

APPARATUS FOR ANNEALING.

APPLICATION FILED JAN.25, 1910.

Patented Feb. 14, 1911.

4 SHBETB-SHEET 14 r/MW??? .wnuc'sses F. H. DANIELS. APPARATUS FORANNEALING.

I APPLICATION FILED JAN. 25, 1910. 983,981 Patented Feb. 14, 1911.

4 SHEETSSHBET 2.

F. H. DANIELS. APPARATUS FOR ANNEALING.

APPLICATION FILED JAILZE, 1910. 983,981, Patented Feb.14,1911.

4 SHEETSSHEET 3.

WITNSES INVENTOR 1. SHEETS-SHEET 4.

I NViNTOR mm Patented Feb. 14. 1911 T L PJHWJ P. H. DANIELS.

APPARATUS FOR ANNEALING.

APPLICATION FILED 71111.25, 1910.

gnnuuunu APPARATUS FOR ANNEALIIIG.

acconunanyinp, drawings, forming a part of this specification.

Figure 1 is-a longitudinal sectional elevation on the line I- l ofFig.2, showing an 1 annealing furnace constructed and arranged.

in accordance with my invention. Fig. 2 is a sectional plan of thebottom half of the section being taken on the line ll-{lhof Fig. 1, thetop half of the section being taken on the line II -II. Fig. l is a longitudinal sectional side elevation showing in vertical section theheating chambers forming the furnace. Fig. 2 is a sectional plan showingthe heating chambers in horizontal section. Fig. 3 is a sectional. endelevation of the apparatus on the line IIIHI of Fig. 1. Fig. 4c is asimilar sectional end elevation through the heating chamber of thefurnace on the line IV-IV of Fig. 1. Fig. 5 is a sectional end elevationthrough the combustion chamber of the annealing furnace, on theirregular line V-V of Fig. 1. Fig. 6 is a sectional end elevationshowing the gas inletopcning leading from the. gas lines into the potcooling chamber of the annealing furnace, this section being taken onthe line VI VI of Fig. 1. 7 is a longitudinal sectional elevationshowing a ,lnodificd form of furnace and Fig. 8 is a plan view of thesame.

My invention relates to the annealing of various materials in pots, andmore part-low larly relates to annealing rods "or wire in such annealingpots.

The object of the invention is to provide a pot. annealing furnace ofimproved construction having novel means for heating and cooling thepots and for heating the gases burned in the furnace in the annealingoperations.

Heretofore in annealing in pot annealing furnaces, the materials beingannealed re main in the furnace only for a suflicient length of timeto-be heated, the pots containingthe hotmaterials being removed while ina heated condition from the furnace and afterward allowed to cool, or hepot with its contents allowed to remai in the UNITED s'ra'rns PA ENTOFFICE.

FRED H. DANIELS, 0F WORCESTER, MASSACHUSETTS.

. improved apparatus.

Specification of Letters Pateiit. Patented Feb, .14, 1911 Applicationfiled January 25, 1910. Serial No; 540,061.

furnace, until the furnace pot and contents had become cool.

In the use of the improved apparatus shown and described, the annealingpots which contain the materials which are to be annealed, areintroduced into the heating chamber of the furnace, and are caused togradually move through the furnace, pass mg successively through. theheating: chairs her into the combustion chamber forming the furnace andthrough the corn hnstion chamber into and through the gas heatingchamber also forming part of my in this way the pots and theircontentsare heated during; their passage through the heating and combosLion caambers, become cooled gradually while. through the ,QZtS heatingchanr her, and at the same time the incoming, unburned gases becomehighly heated by contact with the heated pots in the gas heatingchambcnand, when entering the combustion chamber, are in a propercondition for mixing with the air therein, in order to promotecombustion and burn, the burned highly heating the pot heating chamberof the furnace while passing therethrough.

In the drawings, referring to Figs. 1 to 6, 2 represents the pot heatingcompartment or chamber of my improved furnace and 3 the combustionchamber, which is located intermediate of the heating chamber and aheating chamber 4. The combustion chamber 3 is, supplied with airthrough ports 5 located in the end wall of the coin bastion chamber, asis clearly shown in Figs. 1, 2 and 5. ir is supplied to the ports 5through fines or pipes 6 which are connected to the outlets on theheaters 7 mounted in the-air hgating chamber 8, which is located belowthe heating chamber 2 of the furnace.

The air is supplied by means of a suitable blower, through the air pipe9 and by means of the mushroom valves 14:, or in any other des1redmanner, and the products of combustion are caused to travel through andpass from the heating chamber 2, down fine 16 to the furnace stack. 1

wardly through the conneetin flue 15 into the air heating chamber 8 Were heat of these outgoing burned gases is utilized to heat the airpassing through the heate' rs, then passing outwardly through the stackThe annealing pets 17, after being filled with the materials to beannealed are placed in front of the inlet opening in the end of theheating chamber 2, these pots resting upon water cooled skid pipes 18which extend lengthwise through the heating chamher 2, combustionchamber 3 and gas heat-iv nace.

by means of a cover mounted on wheels so ing chamber 4 of the furnace'As shownin Fig. 1, a pusher 19 is employed to cause the pots-to passgradually through the furnace by a step by step movement. As a pot isintroduced into the heating chamber 2, one is moved out from the door oropening in the opposite end of the furnace in'the gas heating chamber 4.

In the operation of the annealing furnace by my improved method, theannealing pots 17 are successively placed in position in front of thepusher 19. by means of a traveling crane or other suitable-pot ham.furnace" is of considerable length and, While dling device and thepiston of' the pusher 19 is caused to actuate so as to move theannealing pets 17 resting on the skid pipes 18 into the furnace. Afterthe furnace becomes filled with the annealing ,pots, when a pot isintroduced one is caused to issue from the opposite end of the furnace.The

the pots are passing through the heating chamber Q of this furnace, theyand their contents become highly heated by contacting with the burnedgases passing through.

the chamber 2 from the combustion chamher 3. The pots are passed throughthe combustion chamber 3 from the heating chamber 2, and are then causedto slowly move through the gas heating chamber 4. In this chamber 4 thecold, or relatively cold, gases entering through the gas ports arebrought into contact with the outer sur-' faces of the highly heatedpots and cause these pots and their contents to gradually become cooledin a non-oxidizing atmosphere ing chamber 4:.

during their passa e through the gas heat- The gases, by coming incontact with the surfaces of the heated pots, become highly heated'and,on entering the combustion chamber 3, from the chamber 4, are theremixed with the air passing from the airportsfi and are burned, theresulting products of combustion passing forwardly into the pot heatingchamber 2,

Where they contact with and hcat the pots and materials in the potswhile. in this chamher, then passing into the air heating cham- 1 her 8where they are brought into contact with the air heaters 7 and heat theair during its passage through the air heaters 7 in the her end of thefurnace.

issuing finally from the ports 5 in the combustion'chamber 3.

In the modification shown in Figs. 7 and 8, the arrangement of the potheating ch'amber, combustion chamber and gas heating chamber is the sameas in the preceding figures, like parts being marked with like numberswith the letter a' applied thereto, and the pots, instead of bein movedint-o and out of the furnace through doors lo-' cated in its end walls,are placed in and are taken from the furnace through suitable openingsin the ends of the roof of the fur These openings are normally closed asto be horizontally movable upon the track, as is shown in the drawings.

After the pots have been introduced through the opening in the roof ofthe furnace shown in Figs. 7 and 8,.the operation is the same as in thepreceding figures until they have reached the opposite end of thefurnace, when they are removed through the opening in the roof at thecoolingcham- The advantages of my invention .will be- 1 apparent tothose skilled in the art;

Instead of heating the annealing pots and their contents and thenremoving the'pots f-romthe' furnace whil'ein a highly heated condition,and afterward allowing-the pots to cool by contact with the atmospherewhile without-the furnace, the pots are gradually cooled by. contactwith the unburned gases.

passing to the combustion chamber of the furnace and these gases,forming a non-oxidizing. atmosphere,v prevent oxidizat-ion of the potsand very materially increase their life; The gases,.by contacting"withthe highly heated pots-during their -hasf'siige, through the gasheating chamber, ,becomTJi i." highly heated and when leaving thecooling chamber are in; the best possible condition for mixing with theair in the combustion chamber of the furnace, in this-Way avoid- 1 9 ingthe necessity for gas regeneratorsrand utilizing the heat from theheatedpots to raise the temperature of the gases and at: the sametime-'grachially cool the'pots' and their contents. 11

Modifications in the construction and ar-- f rangement ofthe partsmaybemade with- 1 out'departing'from my invention; jllh'e air burned in'the furnace may be. heated'ior'iiht, as is desired. The gas may beheat'dpartly, prior to its entrance into the gas ,heating chamber. The meansemployed for moving the pots throug'hthe furnace may be-var'ied andother changes maybe made partin from my invention.

Iclaim: .1.. Apparatus for annealing comprising annealing pots, a potheating furnace having a compartment for heating unburned gases andmeans for pass ng the annealing 9 without dea I her into the gas heatingcompartment; sub- I stantially described.

3. Apparatus for annealing comprising annealing pots, a pot annealingfurnace having a contpartment for heating unburned gases, a compartmentforming a combustion chamber, a pot heating compartment-and meansarranged to pass the annealing pots from the pot heating compartmentthrough the compartment formin the combustion chamber into thegasheating compartment; substantiallyas described.

4. Apparatus for ani'iealing comprising Pi annealing pots, a pot heatingfurnace hav ing a con'ipartlnent for heating unburned a compartmentforming a combustion chamber, a pot heating compartment, and means forpassing the annealing pots successively through the compartments of saidurnace; Substantially as described.

5. Apparatus for annealing comprising annealing pots and a pot heatingfurnace,

said furnace having a compartment for heating unburned gases, a"compartment forming a combustion chamber communicating with the gasheating compartment and a pot heating compartment communlcatmg with,

the compartment forming. the combustion chamber, and means for passingthe annealing pots successiwely through the heating compartment, thecompartment forming the combustion chamber and the gas heating chamber;substantially as described.

6. Apparatus for annealing comprising annealing pots, a heating.furnace, said furnace having a compartment for heating unburned gases, acompartment forming a combustion chamber and a pot heating compartQment, means for successively passing the pots through the compartmentsof the furnacc, and means for supplying air to the combustion chamber ofsaid furnace; substantially asdescribed.

7. Apparatus for annealing comprising annealing pots, apotheating-furnace having a compartmentv for ligating unburned gases, acompartment formlng a. combustion chamber, a, pot heating compartment,and means for passing the annealing pots suc' cessively through eachcompartment of the furnace, said furnace having means for supplying airto said combustion chamber and.

chamber, and means for supplying unburned gases to said combustionchamber, said means being arranged to bring the unburned gases intocontact with heating pots in the pot cooling chamber and thereby coolthe pots; substantially as described.

9. A potannealing furnace having a con1- partment forming a pot heatingchamber, a compartment forming a combustion chamber, a compartmentforming a cooling chamber, and means for passing the annealing potsthrough said furnace and through said pot cooling chamber, thecombustion chamber having openings thereinto forming air ports, an airheating chamber connected to the air ports and means for conductingburned gases through said air heating chamber to thereby heat airpassing through the air heating chamber to said air ports; sub"stantially as described.

10. Apparatus for annealing articles in pots, comprising a chamber,having a pot heating compartment, a compart ent'forming a combustionchamber and d compartment for heating unburned gases,iand means forpassing the annealing pots throughsaid compartments forming the furnace;substantially as described,

In testimony whereof, I have hereunto set my hand.

v ,FRED H. DANIELS. Witnesses: v i

Geo. SIEURIN, G. AuMnnn'r.

